Brief Description
Marijuana refers to the dried leaves, flowers, stems, and seeds from the hemp plant, Cannabis sativa. The plant contains the mind-altering chemical delta-9-tetrahydrocannabinol (THC) and other related compounds. Extracts can also be made from the cannabis plant. Read the DrugFacts
Learn more:
- Research Report on Marijuana
- NIDA's Role in Providing Marijuana for Research
- NIDA Research on Marijuana and Cannabinoids
- NIH Research on Marijuana and Cannabinoids
- DrugFacts: Marijuana as Medicine
- Health Effects of Marijuana
Statistics and Trends
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Drug | Time Period | 8th Graders | 10th Graders | 12th Graders |
---|---|---|---|---|
Marijuana/ Hashish | Lifetime | 13.50 | 30.70 | 45.00 |
Past Year | 10.10 | 25.50 | 37.10 | |
Past Month | 5.50 | [15.70] | 22.90 | |
Daily | 0.80 | 2.90 | 5.90 |
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Drug | Time Period | Ages 12 or Older | Ages 12 to 17 | Ages 18 to 25 | Ages 26 or Older |
---|---|---|---|---|---|
Marijuana/ Hashish | Lifetime | 45.20 | 15.30 | 52.70 | 47.50 |
Past Year | 15.00 | 12.40 | 34.90 | 12.20 | |
Past Month | 9.60 | 6.50 | 22.10 | 7.90 |
Related Videos
- The Reward Circuit: How the Brain Responds to Marijuana (February 2016)
- I-Science: #CPDD What's Hot - Mothers and Marijuana Use (October 2015)
- I-Science: #CPDD What's Hot - Breastfeeding and Marijuana Use (August 2015)
- NIDA Encourages Community Based Marijuana Research (November 2014)
Related Resources
- Mixed Signals: The Administration’s Policy on Marijuana, Part Four -- Scientific Focus on the Adverse Health Effects of Marijuana Use (Testimony to Congress, June 2014)
- Marijuana: Facts for Teens
- Marijuana: Download the Facts Poster (Teaching Guide)
- Heads Up: Real News About Drugs and Your Body- Year 11-12 Compilation for Students
- Heads Up: Real News About Drugs and Your Body- Year 11-12 Compilation for Teachers
- Marijuana’s Lasting Effects on the Brain, (Message from the NIDA Director, March 2013) (Archives)
- NIDA for Teens: Marijuana
Emerging Trends & Alerts
Get more information on Emerging Trends and Alerts, we will update this page with the latest research findings as they develop.
Get this Publication
Marijuana and Cannabinoids: A Neuroscience Research Summit
Other Articles of Interest
Get Help
Find information about addiction and mental health services in your area. You can search by state or zip code online or call the number. (SAMHSA)
1-800-662-4357
1-800-487-4889 (TTY)